Drilling-machine



' 2' Sheets-Sheet 1.

(No Model.)

R. F. WYATT. DRILLING MACHINE.

No. 510,148. Patented Deo. 5,1893.

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v 2 Sheets-Sheet 2.

(No Model.)

R, F. WYATT. DRILLING MAGHINB.

I Patented Deo. 5, 1893.`

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THE NATIQNAL LITHDGRAPHING coMPANV.

ROBERT F. WYATT, OF JASPER, ALABAMA.

DRlLLlNG-IVIACHINE.

SPECIFICATION forming part of Letters Patent N o. 510,148, datedDecember 5, 1893.

Application tiled April 4, 1893. Serial No. 469,030. (No model.)

To a-ZZ whom it may concern.-

Be it known that I, ROBERT F. WYATT, a citizen of the United States,residing at Jasper,

in the county of Walker and State of Alabama, have invented certain newand useful Improvements in Drilling-Machines; and I do declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and to the letters of reference marked thereon, which form a part ofthis specification.

My invention relates to an improvement in rock drills, and hasparticular reference to that class in which the screw-feed is employed0r those wherein the drill-shaft is threaded and, with the co-operationof an internally threaded bearing, is made to feed the drill proper toits work simultaneously with the revolution of the drill-shaft, and itcomprehends for its object a drill in which the drillshaft and itsoperating mechanism may be adjusted on every side and one which may beoperated solely by hand power.

Afurther object is to make the drill as light and durable as possible,and at the same time not to sacrifice a particle of its efficiency.

With these ends in view I have devised a machine, the essential featuresof which will now be fully disclosed and finally embodied in the claim.

Referring to the accompanying drawings which illustrate the machineaforesaid: Figure l represents a side elevation thereof; Fig. 2 alongitudinal section; Fig. 3 a cross section; Fig. 4 a view showingdiagrammatically the means employed for eecting the adjustmentcharacteristic of my machine; Fig. 5 a detail showing the bearing or boxby which the feed of the drill-shaft is effected.

or way upon which the drill mechanism may be moved to advance it uponthe substance operated on. Working on this track is the base-portion aof the drill mechanism which consists of a metallic table provided withthe arms a and a series of bolt-holes B, the function of which holeswill be hereinafter described. The arms a are bent under at their endsand thereat provided with a set of binding screws B', so that the bentportion may embrace the track A and by means of the binding screws besecured in place.

To the table a the drill mechanism is secured by means of a bolt bpassing from such mechanism, downward and through an opening in thecenter of the table. From the foregoing it will be obvious that thedrill mechanism may be revolved on the pivot or bolt b so as to adjustthe disposition ot' the drill, and that by means of the bolt b and holeswhich are arranged in a circle around acentral opening, it can besecured in the desired position all of which is vshown in detail by Fig.4.

The drillmechanism is mounted upon the U-shaped frame C, having its armsC and C extending vertically, the arms C being bent slightly inwardly atits end, for a purpose that will hereinafter appear. Bolted to the armsC and C is a cross brace c to the upper side of whichv the secondU-shaped frame c', smaller thanthe first, is secured, the arm D of whichis bent inwardly and is on the same horizontal plane as the end C of theframe C. Arranged between the ends of the frame c is a support D shapedlike an inverted U and havingits arms d projecting down sufficiently toembrace the frame c and cross-brace c, whereat they are connected bybolts d thus arranging them together and clamping the support inposition against the frame c and brace c. J ournaled in the upperportion of the support D by means of the short shaft E', is a crown gearE, having an operating crank e fixed thereto by which it is revolved andthe machine operated. The ends Q and D of their respective frames, arearranged to embrace the outer edge of this gear-wheel, thereby aidingthe shaft E to hold the gear in position. Revolubly Ico mounted on thearm C and in the unbent arm of the frame c is a sleeve F having itslongitudinal passage of an angular pattern, preferably square, andprovided with the pinion gear F which meshes with the gear E and bywhich a rotary motion is imparted to the sleeve F.

The reference letter G indicates the drillshaft which is divided intosubstantially two parts or sections, though formed of an integral pieceof steel. The part g, or that part which is locked in the sleeve F, issquare or of such a shape in cross section that it will conform to theshape of the passagein sleeve F, and the remaining portion g is round incross section and provided with a screw thread extending its entirelength. This latter portion g of the shaft G, is journaled in thebearing H shown in detail by Fig. 5. In this view the reference letter Crepresents one of the vertical arms of the frame C, in which is formedan opening Il through which the shaft G projects. This opening is largerthan the shaft and is formed solely to allow the shaft to pass. Pivotedto the outer side ofthe arm C at their lower ends, are two twin-links h,h' arranged to be in their normal position vertical and hence side byside, and having formed in their contiguous edges the semicircularopenings I for the reception of the headed pin or stud I secured to thearm C and embracing the outer side of the links h, h', thereby holdingand steadying them. Below the opening I in the links h, h', is formed asecond pair of semi-circular openings t' in each link and in suchposition that they will form, when the links are in their normalposition, a circular opening. This opening is threaded internally anddesigned for the reception of the part g of the shaft G. The links 7L, hare removably secured in their normal (vertical) position by means ofthe swing-hook t" secured to the link 7L and arranged to swing over theupper end of the link h, thereby locking the two together. They may bedisengaged by swinging the hook to the right thereby releasing it andthe link h. By this means, the shaft G after having been fed as farforward as possible, may be retracted pre paratory to repeating theoperation, simply by opening the bearing `i and disengaging the screwthreads thereof and of the shaft, whereupon it will be free to slideback longitudinally in the sleeve F. Thus it will be seen that upon therevolution of the shaft G effected by means of the sleeve F, the shaftwill be fed forward owing to the co-opcration of the screw threads onthe shaft and in the hole 'i of the links h, 7i. The shaft G whenarranged in the machine, extends from the arm C of the frame C throughthe arm D of frame c and through the sleeve F to the 0pposite end of themachine. The forward end of the shaft G is provided with a suitabledrill chuck J and drill K all of which may be of the usual or anypreferred construction.

To use the invention as a rock drill, the carriage or base upon whichthe entire mech anism is mounted, is advanced upon the bank to bedrilled and the table a, adjusted on the track A so that the drill Kwill engage the bank, whereupon the drill-shaft is started to revolvingand the drill is, as before explained, fed to the rock as fast as itforms a hole therein.

The operation of the screw-feed drill is wellknown and does not requireany further description. The drill may also be adjusted to any positionon its horizontal plane by means of the bolt b and circular series ofopenings h, as shown in the diagrammatical view in Fig. 4.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

A rock drilling machine having a frame consisting of a main portion C,formed in the shape of a horizontally elongated U, and having bearingsin its arms for the drill shaft, a second section, c, shaped as aninverted U, and with its arms secured to the arms of the main portion, athird section c shaped as the first and secu red to the section c, and abinding section D' arranged to embrace the sections c and c and to formbearings for the driving gear, substantially as described.

In testimony whereof l affix my signature in presence of two witnesses.

ROBERT F. WYATT.

Witnesses:

J. B. CARRINGTON, JOHN B. SHIELDS.

